If the carrier centered around 6850.7 or .8, it was probably MAC Shortwave. Heard 'em briefly during this time slot. If you heard a kid doing the wacky laugh that was probably Ultraman, who sometimes runs the show after Dr. Who and Paul Starr.
0045z: Andy Griffith show theme music, either whistling or flute, tough copy here through heavy t-storm crashes.
0046z: My Three Sons theme music
(N. Central TX)